Rev 28 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | mjames | 1 | /* ---------------------------------------------------------------------- |
| 2 | * Copyright (C) 2010-2014 ARM Limited. All rights reserved. |
||
| 3 | * |
||
| 4 | * $Date: 19. March 2015 |
||
| 5 | * $Revision: V.1.4.5 |
||
| 6 | * |
||
| 7 | * Project: CMSIS DSP Library |
||
| 8 | * Title: arm_copy_q7.c |
||
| 9 | * |
||
| 10 | * Description: Copies the elements of a Q7 vector. |
||
| 11 | * |
||
| 12 | * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 |
||
| 13 | * |
||
| 14 | * Redistribution and use in source and binary forms, with or without |
||
| 15 | * modification, are permitted provided that the following conditions |
||
| 16 | * are met: |
||
| 17 | * - Redistributions of source code must retain the above copyright |
||
| 18 | * notice, this list of conditions and the following disclaimer. |
||
| 19 | * - Redistributions in binary form must reproduce the above copyright |
||
| 20 | * notice, this list of conditions and the following disclaimer in |
||
| 21 | * the documentation and/or other materials provided with the |
||
| 22 | * distribution. |
||
| 23 | * - Neither the name of ARM LIMITED nor the names of its contributors |
||
| 24 | * may be used to endorse or promote products derived from this |
||
| 25 | * software without specific prior written permission. |
||
| 26 | * |
||
| 27 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
||
| 28 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
||
| 29 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
||
| 30 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
||
| 31 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 32 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
||
| 33 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
||
| 34 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
||
| 35 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
||
| 36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
||
| 37 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
||
| 38 | * POSSIBILITY OF SUCH DAMAGE. |
||
| 39 | * -------------------------------------------------------------------- */ |
||
| 40 | |||
| 41 | #include "arm_math.h" |
||
| 42 | |||
| 43 | /** |
||
| 44 | * @ingroup groupSupport |
||
| 45 | */ |
||
| 46 | |||
| 47 | /** |
||
| 48 | * @addtogroup copy |
||
| 49 | * @{ |
||
| 50 | */ |
||
| 51 | |||
| 52 | /** |
||
| 53 | * @brief Copies the elements of a Q7 vector. |
||
| 54 | * @param[in] *pSrc points to input vector |
||
| 55 | * @param[out] *pDst points to output vector |
||
| 56 | * @param[in] blockSize length of the input vector |
||
| 57 | * @return none. |
||
| 58 | * |
||
| 59 | */ |
||
| 60 | |||
| 61 | void arm_copy_q7( |
||
| 62 | q7_t * pSrc, |
||
| 63 | q7_t * pDst, |
||
| 64 | uint32_t blockSize) |
||
| 65 | { |
||
| 66 | uint32_t blkCnt; /* loop counter */ |
||
| 67 | |||
| 68 | #ifndef ARM_MATH_CM0_FAMILY |
||
| 69 | |||
| 70 | /* Run the below code for Cortex-M4 and Cortex-M3 */ |
||
| 71 | |||
| 72 | /*loop Unrolling */ |
||
| 73 | blkCnt = blockSize >> 2u; |
||
| 74 | |||
| 75 | /* First part of the processing with loop unrolling. Compute 4 outputs at a time. |
||
| 76 | ** a second loop below computes the remaining 1 to 3 samples. */ |
||
| 77 | while(blkCnt > 0u) |
||
| 78 | { |
||
| 79 | /* C = A */ |
||
| 80 | /* Copy and then store the results in the destination buffer */ |
||
| 81 | /* 4 samples are copied and stored at a time using SIMD */ |
||
| 82 | *__SIMD32(pDst)++ = *__SIMD32(pSrc)++; |
||
| 83 | |||
| 84 | /* Decrement the loop counter */ |
||
| 85 | blkCnt--; |
||
| 86 | } |
||
| 87 | |||
| 88 | /* If the blockSize is not a multiple of 4, compute any remaining output samples here. |
||
| 89 | ** No loop unrolling is used. */ |
||
| 90 | blkCnt = blockSize % 0x4u; |
||
| 91 | |||
| 92 | #else |
||
| 93 | |||
| 94 | /* Run the below code for Cortex-M0 */ |
||
| 95 | |||
| 96 | /* Loop over blockSize number of values */ |
||
| 97 | blkCnt = blockSize; |
||
| 98 | |||
| 99 | #endif /* #ifndef ARM_MATH_CM0_FAMILY */ |
||
| 100 | |||
| 101 | |||
| 102 | while(blkCnt > 0u) |
||
| 103 | { |
||
| 104 | /* C = A */ |
||
| 105 | /* Copy and then store the results in the destination buffer */ |
||
| 106 | *pDst++ = *pSrc++; |
||
| 107 | |||
| 108 | /* Decrement the loop counter */ |
||
| 109 | blkCnt--; |
||
| 110 | } |
||
| 111 | } |
||
| 112 | |||
| 113 | /** |
||
| 114 | * @} end of BasicCopy group |
||
| 115 | */ |